Tube for grain-drills.



. Patented Sept. 23, I902. L. J. SANKER & J. H. $ULLWAN. TUBE FUR GRAINDBILLS. (Application fi led Sept. 30, 1901.

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UNITED STATES PATENT OFFICE.

LEONARD .I. SANKER AND JOSEPH H. SULLIVAN, OF CLEVELAND, OHIO.

TUBE FOR GRAlN-DFilLLS.

SPECIFICATION forming part of Letters Patent No. 709,649, datedSeptember 23, 1962.

Application filed September 30.1901. Serial No. 77,048. (No model.)

1'0 to whom, it rnaty concern:

Be it known that we, LEONARD J. SANKER and JOSEPH H. SULLIVAN, citizensof the United States, and residents of Cleveland, county of Ouyahoga,and State of Ohio, have invented a new and useful Improvement in Tubesfor Grain-Drills, of which the following is a specification, theprinciple of the invention being herein explained and the best mode inwhich we have contemplated applying that principle, so as to distinguishit from other inventions.

Our invention relates to a combined grain duct and cup secured to thereceiving end thereofand commonly referred to as a graindrill tube, itsobject being to combine such two elements in an'economical andefficacious manner.

Said invention consists of means hereinafter fully described, andspecifically pointed out in the claims.

The annexed drawings and the following description set forth in detailcertain mechanism embodying the invention, such disclosed meansconstituting but one of various mechanical forms in which the principleof the invention may be used.

In said annexed drawings, Figure I represents a front elevation of theupper end of a grain -drill tube embodying our invention wherein isemployed a cylindrical duct. Fig. II represents a similar view with onepart of the cup removed. Fig. III represents an elevational view of thatpart of said cup which is shown removed in Fig. II. Fig. 1V represents afront elevation of the upper end of a grain-drill tube embodying ourinvention, in which a tapered or conical duct is employed; and Fig. Vrepresents a similar view showing one of the cup parts removed.

The duct A is constructed of a helicallywound strip or wire, suchconstruction as applied to grain-drill tubes being old and wellknown andforming no part of this invention.

The cup B is formed of two symmetrical parts 13' and B placed injuxtaposition and secured to each other by means of screws 17, passingthrough ears I), formed upon the parts, as shown. The interior of eachpart is formed with a conical concavity 11 which forms a funnel-shapedopening when the two parts are in juxtaposition and form thereceiving-opening of the grain-drill tube, as will be readilyunderstood. The lower portion of each such part is formed withaconcavity 12 of cylindrical form when a cylindrical duct is employed,Fig. II, and of conical form when a conical duct is employed, Fig. V,such two concavities when juxtaposed forming a bore for the reception ofthe duct end at. These concavities are formed so asto leave a shoulder bintermediate the bore and funnel-shaped opening in the upper portion ofthe cup, the depth of such shoulder being substantially equal to thethickness of the strip or wire forming the tube. The adjacent faces 79and b of the two parts B and B are planed off, so as to slightly reducethe cross-sectional area of the ductreceiving .bore and concavitywhereby such parts may be drawn tightly upon the duct end by means ofthe screws 1), and the cup thereby fastened securely thereon. When insuch secured position, Fig. I, the shoulder b overlaps the ductsufficiently to prevent the Walls of the latter from offeringobstruction to the passage of the grain from the cup to the duct.

When a cylindrical duct is employed, means additional to those abovedescribed are used to prevent the separation of the cup and duct. Tothis end we form upon the interior of the duct-receiving bore a helicalweb 19 of a pitch substantially equal to that of the duct convolutions,a part of such Web being formed upon each cup part, as shown in Figs. IIand III. This web is formed with a beveled edge, so as to be readilycapable of insertion between adjacent duct convolutions. When the twoparts are placed upon the cylindrical duct end, these web parts areinserted between the adjacent convolutions and so securely hold the ductagainst longitudinal displacement when the two parts are secured to eachother by means of the screws 1). When a conical duct and bore areemployed, such web is not a necessary part of the construction, sincethe conical form efiectually prevents displacement, as will be readilyunderstood from Fig. IV.

The form of cup shown in Figs. III and IV may be used in connection witha solid-metal duct or a duct having a tapered non-resilient receivingend. When it is desired to use a cylindrical tube of such character, theform shown in Figs. I and II may be used, omitting, however, the helicalweb, as will be readily understood. The construction shown in Figs. Iand II may be varied by constructmg a one-piece solid cup having anintegral continuous thread or thread portion cast or otherwise formed inthe bore b the two-part construction being particularly adapted to theuse of a tapered tube.

Other modes of applying the principle of our invention may be employedinstead of the one explained, change being made as regards the mechanismherein disclosed provided the means stated by any one of the followingclaims or the equivalent of such stat-ed means be employed.

We therefore particularly point out and distinctly claim as ourinvention- 1. A grain-drilltube comprising the combination with atubular duct, of a two-part cup secured upon the outside of one endthereof.

2. Thecombination withaductconstructed of a helically-wound strip, of acup secured upon the outside of one end thereof and provided upon theinterior with a helical Web forming an integral part of the cup andadapted to project between adjacent convolutions of such duct.

Thecombinationwithaductconstructed of a helically-Wound strip, of atwo-part cup secured upon the outside of one end thereof, each cup partprovided with a helical web adapted to project between adjacentconvolutions of such duct.

4. The combination of a duct constructed of a helically-wound strip, atwo-part cup adapted to receive one end of said duct, and means -forsecuring said two cup parts, whereby said cup is secured upon said duct.

5. The combination of aductconstructed of a helically-wound strip, atwo-part cup adapted to receive one end of said duct, each part providedwith a helical web adapted to project between adjacent convolutions ofsaid duct, and means forsecuring said two parts whereby said cup issecured upon said duct.

Signed by us this 23d day of September,

